Precautions

It is very important that your doctor check you or your child closely while you are receiving this medicine to make sure it is working properly. Blood tests may be needed to check for unwanted effects.

This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Tell your doctor or nurse right away if you or your child have a cough; difficulty with swallowing; dizziness; a fast heartbeat; wheezing; shortness of breath; trouble with breathing; chest tightness; swelling in your face, hands, tongue, or throat; a fever; chills; a runny nose or sneezing; itching or hives; or lightheadedness or faintness after you get the injection.

This medicine may increase your chance of having blood clotting problems. Tell your doctor right away if you or your child have a sudden or severe headache, problems with vision or speech, chest pain, shortness of breath, or numbness or weakness while you are receiving this medicine.

This medicine is made from donated human blood. Some human blood products have transmitted certain viruses to people who have received them. The risk of getting a virus from medicines made from human blood has been greatly reduced in recent years. This is the result of required testing of human donors for certain viruses, and testing during the making of these medicines. Although the risk is low, talk with your doctor if you have concerns.